misinformantn.
/ˌmɪsɪnˈfɔːm(ə)nt/, U.S. /ˌmɪsᵻnˈfɔrm(ə)nt/ Now rare.
A person who gives wrong or misleading information; = misinformer n.
ΘΚΠ
the mind > mental capacity > knowledge > conformity with what is known, truth > disregard for truth, falsehood > incorrect information > [noun] > one who misinforms
misreporter1556
misinformer1577
misinformant1846
1846 J. E. Worcester Universal Dict. Eng. Lang. Misinformant.
1882 Standard 11 Nov. 5/7 I am at a loss to know what your mis-informant can mean by the expression.
1967 Public Opinion Q. 31 103 What is the character of the sub-population of ‘misinformants’?
This entry has been updated (OED Third Edition, June 2002; most recently modified version published online March 2022).
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n.1846